Race cycling helmet suitable for men sizes 50 56 cm 56 60 cm us sizes s m l xl main colours black white number of air vents 19 safety features mips brain protection system safety light rear size adjustments wheel adjustment system headring features magnetic closure construction in mold outer material carbon weight 260 g inner material polystyrene eps helmet technologies lazer rollsys multi impact protection rbs marks of approval asnzs 2063